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Greenhouse gases: Difference between revisions
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!Name | !Name | ||
!GWP<sub>100</sub> {{p|Global Warming Potential (per unit mass, 100-year timescale)<br /><br />Defined by question:<br />Emitting 1 ton of the gas is equivalent to emitting how many tons of CO<sub>2</sub>, when considering the warming effects over the next 100 years?}} | ![[Term:GWP|GWP]]<sub>100</sub> {{p|Global Warming Potential (per unit mass, 100-year timescale)<br /><br />Defined by question:<br />Emitting 1 ton of the gas is equivalent to emitting how many tons of CO<sub>2</sub>, when considering the warming effects over the next 100 years?}} | ||
!Relative potency {{p|This metric is not tied to a particular timescale.<br /><br />Defined by question:<br />1 ppm of the gas in the atmosphere, has the same warming effect as how many ppm of CO<sub>2</sub>?}} | !Relative potency {{p|This metric is not tied to a particular timescale.<br /><br />Defined by question:<br />1 ppm of the gas in the atmosphere, has the same warming effect as how many ppm of CO<sub>2</sub>?}} | ||
!Atmospheric longevity | !Atmospheric longevity | ||
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<!-- TODO: elaborate on all this --> | <!-- TODO: elaborate on all this --> | ||
<!-- DRAFT: PFCs (CF4 and C2F6) have an even higher potency if looking at the ultra-long term (hundreds of thousands of years). If we emit too many PFCs,{{qn}} it might become impossible to maintain normal atmospheric temperatures without somehow removing so much CO2 from the atmosphere that plants can't grow (which would be bad, for obvious reasons). --> | <!-- DRAFT: PFCs (CF4 and C2F6) have an even higher potency if looking at the ultra-long term (hundreds of thousands of years). If we emit too many PFCs,{{qn}} it might become impossible to maintain normal atmospheric temperatures without somehow removing so much CO2 from the atmosphere that plants can't grow (which would be bad, for obvious reasons). --> | ||
<!-- TALK: ultra-longtermist perspective: | |||
We shouid define GWP<sub>longterm</sub> as: relative_potency * half_life / half_life_of_CO2 | |||
This would matter for the "immortal" fluoride compounds in thousands of years from now, if humanity never finds a way to scrub them faster from the atmosphere. | |||
--> | |||
==External links== | ==External links== | ||
* [https://www.epa.gov/ghgemissions/overview-greenhouse-gases Overview of Greenhouse Gases - US EPA] | * [https://www.epa.gov/ghgemissions/overview-greenhouse-gases Overview of Greenhouse Gases - US EPA] | ||